From top to bottom
1) Kanban and Scrum, making the most of both
2) 97 things every programmer should know
3) The clean coder
4) Building microservices: Sam Newman
5) The Pragmatic Programmer
6) Introduction to Algorithms

All the team select which books to buy, and everybody picks a book and we have a couple of reading sessions a week. No phone or screens allowed during reading time. We let our brains rest by learning